x86: shuffle use of __attribute__((packed))

x86: shuffle use of __attribute__((packed))

This is almost all manual shuffling of __attribute__((packed)) statements to
__packed at the head of the structure.

The only different change is in tboot.h, removing some now-redundant ifdefs.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
Reviewed-by: Jan Beulich <jbeulich@suse.com>